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Effects of aging treatment and peripheral coarse grain on the exfoliation corrosion behaviour of 2024 aluminium alloy using SR-CT
- Source :
- Journal of Materials Research and Technology, Vol 9, Iss 3, Pp 3219-3229 (2020)
- Publication Year :
- 2020
- Publisher :
- Elsevier BV, 2020.
-
Abstract
- The exfoliation corrosion behaviour of 2024 aluminium alloy was investigated through exfoliation corrosion test, together with synchrotron radiation X-ray computed tomography (SR-CT) to achieve the 3D segmentation of precipitated phases, cracks and corrosion products. The results demonstrate that aging treatment has a significant effect on the distribution of the precipitated phases in the 2024-T4 aluminium alloy, and the precipitated phases continuously distributed along the grain boundary would lead to intergranular corrosion (IGC) which is easily evolved into exfoliation corrosion. In the 2024-T2 aluminium alloy, the longest crack was found to locate at the boundary between the inner grains structure and outer peripheral coarse grain (PCG) structure, which indicates that the corrosion is attributed to electrochemical property difference of two structures.
- Subjects :
- lcsh:TN1-997
Materials science
2024 aluminium alloy
Computed tomography
02 engineering and technology
engineering.material
Electrochemistry
01 natural sciences
Corrosion
Biomaterials
Peripheral coarse grain (PCG)
0103 physical sciences
Aluminium alloy
medicine
Exfoliation corrosion
lcsh:Mining engineering. Metallurgy
010302 applied physics
medicine.diagnostic_test
Metallurgy
Metals and Alloys
SR-CT
Aging treatment
Intergranular corrosion
021001 nanoscience & nanotechnology
Surfaces, Coatings and Films
visual_art
Ceramics and Composites
engineering
visual_art.visual_art_medium
Grain boundary
0210 nano-technology
Subjects
Details
- ISSN :
- 22387854
- Volume :
- 9
- Database :
- OpenAIRE
- Journal :
- Journal of Materials Research and Technology
- Accession number :
- edsair.doi.dedup.....62885cca31d749c8c27cc0a403e5d761
- Full Text :
- https://doi.org/10.1016/j.jmrt.2020.01.069